Coexistence mechanism using dynamic fragmentation for interference mitigation between Wi-Fi and Bluetooth

Authors:
Alex Chia-Chun Hsu;David S. L. Wei;C.-C. Jay Kuo
Affiliations:
Dept. of Electrical Engineering, University of Southern California, Los Angeles, CA;Dept. of Computer and Information Sciences, Fordham University, Bronx, NY;Dept. of Electrical Engineering, University of Southern California, Los Angeles, CA
Venue:
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Year:
2006

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Abstract

In this paper, we present a non-collaborative coexistence mechanism using dynamic fragmentation that functions very well at the Wi-Fi in the presence of Bluetooth interference. The proposed scheme tries to optimize MAC layer packet length such that the Wi-Fi device has better chance to avoid the interference caused by Bluetooth devices. The mechanism dynamically adjusts the fragmentation level based on the current packet error rate (PER). We developed an analytical model that provides the MAC the necessary information (in terms of PER) to decide the right time for further packet fragmentation. The developed model is also employed to measure the throughput of the Wi-Fi device. Simulations are also performed to validate the developed model. We show that our coexistence mechanism could significantly improve the performance of Wi-Fi in both throughput and transmission delay, though there is only slight performance improvement at the Bluetooth side.